Brush making machine



Feb. 10, 1948. C. JOBST' 2,435,924

BRUSH MAKING MACHINE Filed Aug. 9, 1943 4 Sheets-Shae? 1 lllllmlllllll mII a mllll I INVENTOR.

CONRAD JOBST BY 4 W n/WM ATTORNEYS Feb. 10, 1948.

C. JOBST 2,435,924

BRUSH MAKING MACHINE Filed Aug. 9, 1943 4 Sheets-Sheet? INVENTOR.

CONRAD JOBST ATTORNEYS .5 v1 E M 5 M N 0d .1 R 8 N C PD 8 ES T 3 nnbv T4 LU W A v 1 D h R I N O 4 C Y B M 1 9 1 wp 9 S M BM OT. J u .M C d 5mUi F. B

Feb. 10, 1948..

Feb. 10, 1948. C.'JOBST BRUSH MAKING MACHINE Filed Aug. 9, 1945 4Sheets-Sheet 4 INVENTOR. CON RAD J 05s? FIG].

ATTORN EYS Patented Feb. 10, 1948 BRUSH MAKING MACHINE Conrad Jobst,Toledo, Ohio, assignor to The T- ledo Automatic Brush Machine Company,Toa ledo, Ohio, a corporation ofOhio Application August 9, 1943, SerialNo. 497,977

The invention relates to brush making, machines and has for its objectincrease in the speed of production and the elimination of certaindefects inherent in constructions heretofore used.

In the present state of the art one type of brush-making machine largelyused, simultaneously operates on two brush backs, boring thetuft-receiving holes in one back and setting tufts in the correspondingholes "of the other back. It has been found that the time intervalrequired for the setting ofatuft is less than that necessary forsuccessfully boring a tuft-receiving aperture in a brush back,andconsequently when these two operations are carried outsimultaneously, the limit in speed of production is set by the boringoperation. Brushes have also been manufactured by boring the brush'backsin one machine and setting the tufts in the'boredbacks in anothermachine. It has been found,'however, that the materials used for brushbacks'and also the shapes of such backs, render it practicallyimpossible to transfer a back from one machine to another and tomaintain,exact-registration of the holes with the tuft setti'ng'means.

To avoid difiiculties in both method of brush manufacturing abovedescribed, I have devised a method in which the cycle of successivetuft-setting operations differs from the cycle of boring operations,while at the same time the brush backs remain in the same holderduringbotl'i operations. I have further devised a machine in which aplurality of tuft-receiving holes are simultaneously bored in onebrushback during the interval in which a series of tufts are set in thebores of another back. By these improvements the speed of production ofmy improved machine is considerably increased overthat possible with theolder type, while accuracy in registration is maintained.

In the drawings:

Fig. 1 is a sectionalside elevation of my improved machine;

Fig. 2 is an end elevation thereof;

Fig. 3 is a plan view;

Fig. 4 is a vertical sectionthrough a portion of the turret,illustrating the friction drive and indexing mechanism; v

Fig. 5 is a plan view of the indexing mechanism; v 1

Fig. 6 is a longitudinal section through the multiple drillingmechanism;

Fig. 7 is an end elevation thereof; h

Fig. 8 is an elevation of the opposite end Fig. 9 is a section on line99,.Fig. 6; and

Fig. 10 is elevationof, the cam controlling 10 Claims.

2 h the feeding movements of the multiple drilling mechanism;

Fig. 11 is an end elevation of a portion of Figure 1 showing thecontrolling switches and operating mechanism.

As the tuft-setting mechanism is similar to that forming the subjectmatter of certain of my former patents, it need not be described indetail in the present case. However, generally described, it comprises areciprocating member carrying the tuft-setting nozzle, and cooperatingmeans for gathering the bristles of the tufts, and for drivingandanchoring the same.

The tuft-setting mechanism generally indicated at A is mounted on asuitable rame B and i operated by [an electric motor or other drivingmeans (not shown) through a suitable transmission mechanism C. Thistransmission also includes a train D for driving a shaft E on which aremounted controlling cams F and F.

The work holder is preferably in the form of a turret G, adapted to holda series of brush backs which, through the operation of an indexingmechanism, are successively presented in operative relation to thetuft-setting mechanism. Inasmuch, however, as the reciprocatingtuft-setting means has only a rectilinear path of travel, it isnecessary to impart to the work holder additional movements forsuccessively registering the holes in a bored back with said line oftravel. On

the other hand, as the boring mechanism must i dexing operations.

To fulfill conditions just described, the frame B has mounted thereon aguideway H which, as shown, is slightly inclined from the vertical andwith which is 'slidably engaged a movable head I. This head has at itsupper end a transversely extending guideway I in, which is mounted acarriage J, capable of transverse reciprocation. The turret G is mountedon a portionof this carriage while upon another portion, there ismounted a multiple boring mechanism K. The head I is actuated to beraised or lowered in the guideway H by the cam F which engages a rollerI on said head. The carriage J is actuatedby the cam F which engages aroller L on a vertically extending lever L centrally pivoted at Id. Theupper end of this lever has a roller L engaging a substantially verticalgroove J in a depend:

sham

Multiple boring means As previously stated, the multiple boring means ismounted on the carriage J, and'therefore simultaneously advance all ofthe drills K and in its rearward phase will retract said drills.However, as above described, the forward advancement of the drills isnot continuous, but in small steps, which is accomplished by properlyfashioning the cam. Also, instead of continuing this step by stepadvancement throughout the full forward movement of the drill, the drillis retracted after drilling a portion of the depth of the hole so as toclear it from chips or shavings,

and then is again advanced to complete the v boring to the full depth.Such movement is also accomplished by the fashioning of the cam, whichmaintains a fixed relation to the turret G during all movements impartedby thecams Fahd F for completing a tuft-setting cycle. Thispermits ofsimultaneously boringall of the tuftreceiving apertures at a relativelylow rate of drill speed. Also, instead of continuouslyfeeding the drillsinto the work, they may be advanced intermittently, so. as to formseparate small shavings instead of one continuous spiral shaving- Thisis adVa-ntageousin that it permits of easily clearing the d-r'ills aftereach multiple drilling operation.

The multiple boring mechanism may be of the type illustrated. and.described in my former Patent 1,661,179, issued March 6, 1928. In detailand as illustrated in Fig. 6, K is a frame mounted on the carriage Jforming aguideway fora slidable head K. Onthis head aremounted a pair ofparallelly arranged, spaced shafts K having mounted thereon at theirrear ends gear Wheels K which, through intermediate gear wheels K aredrivenfrom a central .gear wheel K The gear wheel K is on a shaft K.which is..connected by a splined coupler K with a drive shaft K. Thearrangement is such that the headK is capable of -reciprocating movementin the. frame K; while maintaining the driving engagement betweentheshafts .K and K? :At the forward endsof the shafts K are, eccentricpins K which engage -a plate K to impart thereto an oscillatorymovement. K and K12. are spaced plates in advance of the plate K mountedon the head K, and these plates are bored to receive the drills K 3.arranged in a pattern corresponding to the desiredpattern of tufts. Eachdrill is bent at its rear end tolform a crank K thethrow of which is thesame as that .of the eccentric pins K so that the oscillation of theplate K will simultaneously rotate all of the drills. A strippermount'edon the shaftK to travel therewith and with the head K. Thispinion is of sulficient length to maintain intermeshing, engagement witha gearwheel M mounted on a shaft M journaled in bearings on the, frameK. On the shaft M is a worm M inengagement with a worm gear M on ashaft. M extending transversely to the shaft M and journaled in theupper portion of the frame M. M is a cam also mounted on the shaft M andhaving a peripheral engagement with a cam follower M mounted on theupper end of alever' M This lever is fulcrumed at M to the lower portionof the frame K, and intermediate the fulcrum and the follower M has apivoted'shoe M engaging a vertically extending slot or channel M in thehead K. The arrangement is such that the rotation of the cam M willimpart to the lever M a reciprocatory movement and a correspondingmovement to the head K "which, limits forward phase, will'.rlthatsitflshould occupy all of this time.

completes thedrilling and retraction of the drills in one cycle.

; It isessential that the drilling cycle should be completed. within thetime interval required for the-tuft-setting cycle, but it is notnecessary Thus provision must be made for the intermittent operationofthe driving shaft K and maintainingthis operation in timed relation tothe operation of the tufting mechanism. Preferably the shaft K is drivenby an electric motor N mounted on the frame and having a universalcoupling connection withlthe shaft. The motor is controlled bystartingand stopping electric switches 0 mice which are actuated by tripmembers 0 and; '0 mountedfon' the shaft E. Asthis shaft 'actuatesjthe"cams Fand F, the tn 's ean be positioned in properly timed relation tothe tufting cycle and to the indexing mechanism, which will now bedescribed.- W

Indexing mechanism The turret G has, a series of individual holders Gthereon with which the brush backs may be engaged. One of these holdersis positioned in operative relation to the tuftingmechanism, while,another holderis in operative relation to the, v multiple drillingmechanism. After the completion of each tufting cycle the turretisrotated one. step to bring an unbored brushback into registration, withthe boring mechanism, and a boredlbrush back in registration with the,tufting, mechanism. This I is I accomplished by the followingmechanism. The turretG, isrevolubly mounted on a post (It extendingupward from the carriage ,J, and on this post, beneath the turret, isalso joumaleda worm wheel 1?. This .worm wheel is driven, by. a. worm,P'.;on,,a shaft .P?,- which latter is driven, throughllhe medium of agear train P from the gear. wheel M. Thus wheneverthe motor, N is,inoperation, rotary movement will be imparted to the worm wheelP.Secured to the worm wheel is a friction drive'Q which engages, an index.-plate R secured to theturret G, The index plate R is provided withlocking notches .R' correspond: ing in angular position to the, holdersG on-the turret and one of ,these notches is'normallyen- 'gaged by alocking dog R The dog is pivoted at R and is yieldablyheldinengagementwith a locking notch'by a spring ltfi'engaging alever .arm .3R isa member slidably engaging a bearing R and provided with fa-fing erRf. This finger, in the sliding movementpf the member R isadaptedtoengage a pin R onfthe lever arm R and to rock' said arm so'.asto disengage the dog R However this disengagementfis only instantaneous,as the.fin e li 1 ae$e beyond the pin R permitting the spring-B}, toreturn the dog. The member R is preferably electromagnetically operatedby a solenoid S wh h, yh nsn r i eq il rew ia a s a member S and'impart'a like movement to the member R The member Rfiiis pivoted to'the ,corei atv R1 so that: in itsreturn movement the finger R passesbeneath the pin R without disturbing the position of the lever arm R In.the operation of the construction just described, the turret Gis-normally held against rotation by. the dog R so as to maintain fixedrelation to-the carriage J during the performanceaofthe tuft-settingcycle. .At the completion of this cycle the solenoidSI is energized towithdraw the, dog, whereuponthe friction'clutch Q will impart rotarymovement to the index plate and turret. However, the almostinstantaneous release of the dog R? will permit it to engage in the nextnotch R of the index'plate so as to again lock the turret in fixedrelation to the carriage J.

Complete operation The machine is adapted to operate continuously forany desired length "of time. The op erator places "the brush backs inengagement with the holders G" on the" turret G so as-to be presentedfirst to the multiple drilling mechanism.- This, as previouslydescribed, operates at a relatively low speed of drillfeed and with aregister the holes in a drilled brush back with the tuft-settingmechanism. However, as the holder for bothbrush backs on said carrier,and

Y mittentl moving said carrier throughacycle to present the bores of abrush back in one position thereon-successively in registration withsaid-tufterating between cycles forsuccessively transferring said brushbacks'from said last mentioned position to said first mentionedposition.

3. In a brush machine, the combination with a reciprocating tuft-settingmechanism, a carrier fora series of brush backs, and means forintermittently moving saidcarrier through a cycle to present the boresof a'brush back in one position thereon successively in registrationwith said tuft-setting mechanism; of means mounted upon and movable withsaid carrier-for simultaneously boring'all of the tuft-receiving holesof a brush back in another position thereon, a common means operatingbetween cycles for moving said j holder to transfer the brush back fromsaid last multiple drilling mechanism is mounted on the carriage infixed relation to the turret, such movements do not interfere with itsoperation. The drilling cycle need not necessarily occupy all of thetime required for the complete tuft: setting cycle. Thus the motor N isdeenergized at the completion of the drilling cycle and not againenergized until the end of the tuft-setting cycle.

Electric switches O and 0', operated respec tively by the trip members 0and 0 control the starting and stopping of the motor. The motor N is,however, started slightly in advance of the indexing operation, so thatbefore the dog .3 is withdrawnfrom the plate R, rotary motion isimparted to the worm wheel P. Thus as soon as the dog is withdrawn, thefriction drive Q will impart movement to the index plate to advanceanother notch R into position for engagement with the dog.

The machine may be operated at the highest speed permissible-for thetuft-setting operations for the time required for the complete cyclewill be abundant for the performance of the multiple drilling operation.

What I claim as my invention is:

1. In a brush machine, the combination with a tuft-setting mechanism ofa rotary work carrier movable to present bores in a brush backsuccessively in registration with said tuft-setting mechanism, and meansnormally in fixed relation to said work carrier for simultaneouslyboring a plurality of tuft-receiving holes in another brush back.

2. In a brush machine, the combination with a reciprocating tuft-settingmechanism, a carrier for a series of brush backs, and means forintertion." 1 I r 1. In a brush machine, the combination with areciprocating tuft-setting mechanism, a work carrier, and means forintermittently moving said carrier through a cycle to present the boresof a brush back thereon successively in registration with saidtuft-setting mechanism; of a work holder for a plurality of brushbacksmounted on said carrier, a multiple drilling mechanism mounted onsaid carrier and movable therewith, and an indexing mechanism operatingbetween successive tuft-setting cycles for moving said mentionedposition tosaid first mentioned posiwork holder to present s aidbrushbacks successively to said multiple boring mechanism and to saidtuft-setting mechanism.

5. In a brush machine, the combination withreciprocatingtuft-settingmechanism, a work carrier, and means forintermittentl 'moving said carrier through a cycle to present the boresof e a brush back thereon successively in registration with saidtuft-setting mechanism; of a turret mounted on said carrier and adaptedto simultaneously hold a series of brush backs, a multiple boringmechanism also mounted on said carrier,

and indexing mechanism operating between successive tuft-setting cyclesfor rotatably adjusting said turret to successively presentsaid brushbacks to said multipleborihg mechanism and to said tuft-settingmechanism.

. to boring and tuft-setting mechanisms, of means 6. In a machine forforming brushes including for successively setting in one cycle all ofthe tufts of one brush back means for simultaneously drilling in anindependent cycle all of the tuftreceiving bores of another brush back,and indexing means operating in the latter cycle after the completion ofthe drilling operation and itself completed within the limits of thetufting cycle. 1

'7. A brush machine comprising a tuft-setting mechanism a work holderfor a series of brush all of the holes in another brush back, saiddrilliingkcyple hein'g..1nc1ud ed within,thelimitsci said-.tuftinglcycle. i1; .1; a

8., In a brushmachinexcomprisingiiai .tufting ,;mechanism forsuccessively setting-the. tuftsmin "one brush back during onecycle-ofitsvoperation,

a multiple drilling mechanism .fon simultaneously forming all 01 theybores,inanother,brushmack in an independent cycle,--the latter.-cycle;being completed within the limits. ofv theltuiting cycle,

and indexing means ,included rint the drilling .cycle. 7 H, 9. In abrush machine, includingtufting-mech- -anism for successively setting:the tufts Y in all of the bores of onebrushwbackl:a'multiple drillingmechanism for simultaneously fdrilling all -.of the James inanother:brush'bacltduringthe 'tufting interval, said drilling mechanismincluding means for intermittently advancing'the drills into the work;in short-steps to form.,separate =--small shavings of lessthan-one-.half-spire length,

which are readily clearediromthe drills when removed. 1

10. In a brush machine,--including tufting mechanism for successivelysetting the tufts in all of the bores of one brush back, a multipledrilling mechanism ionisimultaneouslyedriiling allot the .bores. inanother brush backlzduringthe tufting interval, said drilling;mechanismineluding .means for intermittently advancinglthe drills intothe workin short steps to form separatesmall shavings of lessthanone-half spire length which are readily cleared from theadrills whenremoved. and also includingimeanswfor withdrawing the drills afterboring a portioniof the depth to clear the shavings therefrom beforecompleting the-drilling operationr M CONRAD JOBSTQI EFE NC S IT DL I,The following referencesare of-record :in'the file of this patent: HUNITED STATES PATENTS Name -Date Willcox et a1. Sept. 9, 1879McClintock- Young et a1. Jan. 24, 1911 Miller May 7, 1918 Mertes May 10,1932 Number

